From: Nikita Danilov <nikita@clusterfs.com>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org, mason@suse.com,
andrea@suse.de, hugh@veritas.com, axboe@suse.de
Subject: Re: [rfc][patch] remove racy sync_page?
Date: Tue, 30 May 2006 12:24:17 +0400 [thread overview]
Message-ID: <17532.305.602559.660069@gargle.gargle.HOWL> (raw)
In-Reply-To: <447BD63D.2080900@yahoo.com.au>
Nick Piggin writes:
> Nick Piggin wrote:
> > Linus Torvalds wrote:
> >
> >>
> >> Why do you think the IO layer should get larger requests?
> >
> >
> > For workloads where plugging helps (ie. lots of smaller, contiguous
> > requests going into the IO layer), should be pretty good these days
> > due to multiple readahead and writeback.
>
> Let me try again.
>
> For workloads where plugging helps (ie. lots of smaller, contiguous
> requests going into the IO layer), the request pattern should be
> pretty good without plugging these days, due to multiple page
> readahead and writeback.
Pageout by VM scanner doesn't benefit from those, and it is still quite
important in some workloads (e.g., mmap intensive).
Nikita.
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next prev parent reply other threads:[~2006-05-30 8:24 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-29 9:34 Nick Piggin
2006-05-29 19:15 ` Andrew Morton
2006-05-30 0:08 ` Nick Piggin
2006-05-30 1:32 ` Andrew Morton
2006-05-30 2:54 ` Nick Piggin
2006-05-30 3:14 ` Andrew Morton
2006-05-30 4:13 ` Nick Piggin
2006-05-30 9:05 ` Jens Axboe
2006-05-31 13:43 ` Nick Piggin
2006-05-31 15:09 ` Hugh Dickins
2006-05-31 15:22 ` Nick Piggin
2006-05-31 17:51 ` Jens Axboe
2006-05-31 17:50 ` Jens Axboe
2006-05-30 4:20 ` Linus Torvalds
2006-05-30 5:07 ` Nick Piggin
2006-05-30 5:21 ` Nick Piggin
2006-05-30 6:12 ` Neil Brown
2006-05-30 7:10 ` Nick Piggin
2006-05-31 4:34 ` Neil Brown
2006-05-30 8:24 ` Nikita Danilov [this message]
2006-05-30 17:55 ` Linus Torvalds
2006-05-31 0:32 ` Nick Piggin
2006-05-31 0:56 ` Linus Torvalds
2006-05-31 1:33 ` Mark Lord
2006-05-31 6:11 ` Jens Axboe
2006-05-31 12:55 ` Mark Lord
2006-05-31 13:02 ` Jens Axboe
2006-06-01 13:19 ` NCQ performance (was Re: [rfc][patch] remove racy sync_page?) Jens Axboe
2006-06-01 14:56 ` Avi Kivity
2006-06-01 15:03 ` Jens Axboe
2006-06-01 18:04 ` Jens Axboe
2006-06-05 5:30 ` Avi Kivity
2006-06-05 7:59 ` Jens Axboe
2006-05-31 12:31 ` [rfc][patch] remove racy sync_page? Helge Hafting
2006-05-31 12:36 ` Arjan van de Ven
2006-05-31 13:29 ` Nick Piggin
2006-05-31 13:41 ` Jens Axboe
2006-05-31 13:54 ` Nick Piggin
2006-05-31 14:43 ` Linus Torvalds
2006-05-31 14:57 ` Nick Piggin
2006-05-31 15:13 ` Linus Torvalds
2006-05-31 15:09 ` Linus Torvalds
2006-05-31 18:13 ` Jens Axboe
2006-05-31 18:26 ` Linus Torvalds
2006-05-30 5:36 ` Nick Piggin
2006-05-30 18:31 ` Hugh Dickins
2006-05-31 0:21 ` Nick Piggin
2006-05-31 3:06 ` Hugh Dickins
2006-05-31 14:30 ` Hugh Dickins
2006-05-31 17:56 ` Jens Axboe
2006-05-30 5:51 ` Josef Sipek
2006-05-30 6:44 ` Nick Piggin
2006-05-30 6:50 ` Nick Piggin
2006-05-30 13:12 ` Josef Sipek
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